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(No Model.; 2 sheets-sheet' 2; J. D. MGDOUGAL.

METAL CUTTING MACHINE.

Patented Deo.. 14, 1886.

WITJV'ESSES .dttorney 4, my improvements.

UNITED STATES PATENT OFFICE.

JAMES D. MCDOUGAL, OF COLUMBUS, OHIO, ASSIGNOR OF ONEHALF TO XV. R. KINNEAR, OF SAME PLACE.

METAL-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 354.334, dated December 14, 1886.

Application filed September 2l, 1886. Serial No. 214.175. (No model.)

To @ZZ whom it may concern.-

Be it known that I, JAMES D. MoDoUGAL, a citizen of the United States, and a resident ot Columbus, county of Franklin, State of Ohio, have invented new and useful Improvements in llIetal-Outting Machines, of which the following is a full and exact description, reference being had to the accompanying dra-wings, making part of this specitication.

My invention relates to improvements in metal-cutting shears; and it consists in the construction and arrangement of the parts to accomplish the following` objects: first, to mark. the metal for manipulation while being cut; second, to cut differing and certain lengths without a second adjustment of the parts; third, to cnt different shapes without a second adjustment of the parts; fourth, to adjust the cutting-blades rapidly and easily; fth, to prevent the slipping ofthe adjustment when once set.

Myinvention is used principally in the manufacture of sheet-iron moldings. Themethod heretofore adopted has been to cnt the metal 1n square pieces .and then make the measurements for the molding. The measurements are designated by holes punched by means of an awl or other pointed instrument. This takes a great deal of time and labor.

In the drawings, Figure l is a perspective vlew of metal-cutting shears provided with Fig` 2 is a plan view of the same. Fig. 3 is a section of the parallel gages. Fig. 4.- is a plan view of the anglegages. Fig. 5 is an elevation of the same. Fig. 6 is a front elevation of the machine with the parallel gages removed. Fig'. 7 is aside elevation ofthe same. Fig. Sis a detail view of the marking-points. Fig. 9 is a detail view of the clamping-jaws separated. Fig. l() is a .sectlon through the blades and clamping jaws.

In the drawings, K indicates the bed or table of the machine which is supported on the frame U. It is hollowed out in the center to form the basin I for the reception ofthe tools, and is provided with the slots H for the adjustment of the angle-gages a. It is also provided with the slotted brackets G upon its outer side for the reception of the parallel gage-supports. From the rear corners extend upward the slotted arms D. The arms D are slotted on theinner side to form Ways, in which the oscillating blade operates. At the lower extremity of the slots they extend through the arms D for the reception of the lugs B. Attached to the lugs are spiral springs O, which are connected at the other end to the top ofthe arms D.

Operating in the slots in the arms D is the blade-frame B2, which is provided with the lugs B', extendingthrough the lower part of the slots. To the blade-frame is attached the blade B. Above the blade B the frame B2 is provided with the hinge-lugs on,extending out over the table. Enl'olding them are the hingelugs Z upon the clampingjaw A. Between each pair of the hinge-lugs Z are swung the lugs 7a of the clampingjaw A. The rod h being` passed through all the lugs forms a hinge for` the three parts.

The clamping-jaws A and A are so constructed as to approach their faces near t0- gether. The meeting face of the jaw A has a longitudinal slot cut in it, into which is fixed the rubber cushion g'. This cushion receives the projections upon thc side of the prickingpoints p, and accommodates itself to any inequalities of thickness in the said projections, and thus the said points are held firmly in position. The clamping-jaws and blade-frame are provided with bolts a and o, the former passing through the clamping-jaws and entering threaded perforations in the blade-frame, the latter passing through the clampingj aw A .and entering into threaded perforations in the jaw A.

Between the jaws A and A are placed at will the prickingpoints E. These points are provided with the square lug p, which corresponds in size to the slot t in the jaw A, and are made rights and lefts for the purpose of getting close measurements.

Below the blades B, and secured to the table of the machine, is the ledger-blade B', which operates in conjunction with the blade B3. Adjoining this ledger-blade, and directly beneath the pricking-points E, is placed a strip of wood, which is set in the table.

Pivotally attached to the depending lugs S of the blade-frame are the pulling-rods N. They are in two sections and are connected by IOO means of a swivel-link, l?. The lower sections are pivotally attached to the foot-lever O, which is swung upon the frame of the machine. The two pulling-rods are connected at their tops by a jointed rod, the section of which has v a ring, R, at the end that enfolds the upper part of the swivels I), and is provided with a set-screw, T. The swivel M upon t-he connecting-rod C is also provided with a set-screw, substantially as shown.

In the face of the cable K are cut four in verted-T-shaped slots. Into these slots are placed the heads of bolts which hold the anglega-ges a. The'anglcgages a are formed with perpendicular fiangesvon their inner sides to allow the angle of a piece of metal to set in them. They also are provided with a circular slot cut in them, as shown, through which the bolt f passes. Upon this slot is a set-screw, which holds the gages in position.

Into the slotted brackets G upon the table K are placedfthe ends of the slotted supports of the parallel gages d b. The parallel gages are hinged together by means of the link s c, and secured in position upon the slotted supports by means of the bolts r. The gage b is provided with small slots where the bolts r come through to allow of an opening and closing motion. The gages can be set any distance from the blade and secured by means of the bolts r.

In the manufacture of sheet-iron moldings the pieces arc cut in squares marked and bent accordingly. To accomplish the iirst steps is what this machine is designed for. If the sheets are tov be cut twenty by twenty-eight inches, the parallel gages are set with the innerface of d twenty inches from theblade. The gage b is then set eight inches from the inner face of the gage d. Both gages are then screwed firmly to the slotted supports by means of the bolts 9'. The sheets are now cut to the desired size without further adjustment, as one length is out with the metal resting against the perpendicular face of the gage d, and the other with the metal resting against the face of the gage b. As the metal is cut it is marked close up to the bladeby the prickingpoints E, which are set as desired by loosening the bolts o and shifting the points. W'hen the points are set, the bolts o are screwed into place and the points held rigidly. If itis desired to retain the measurements and not use the points, the bolts n are withdrawn and the clamping-jaws turned up and out of the way on the hinge h. When it is desired to cut the pieces in differing shapes, it is done by adjusting the anglegages a each to cut a different angle, as shown in Fig. 2 of drawings, and then secured by means of the set-screw f. The slot e in the gages allows of any angular adj ustment,while the slots in the table allow any forward or backward adjustment. Vhen the gages are set, the operator can cut four differing anglesv or shapes without further adjustment.

At every fall of the blade-frame the springs C are extended, and when thev frame is released they draw it into position. As the machines of this description are operated, the pulling-rods are lengthened out and the stroke of the blade becomes irregular. To prevent this, I have placed the swivel-links P upon each pullingrod, so that a slightr turn upon either rod will raise or lower the stroke of either end. To secure the adjustment the ringed ends of the connection-rod L, provided with 'the setscrews, are placed over the ends of the swivels and the set-screws tightened upon them. The connecting-rod L is used as a brace, and is also provided with a swivellink and a set-screw.

1. In a metal-cutting machine, and in con1- bination with the blade thereof, of adjustable pricking-points held in position upon the said blade by any suitable device, substantially as set forth.

2. In a metal-cutting machine, and in combination with the blade thereof, of clampingjaws opening upon a hinge and swung upon the blade-frame and provided with a tighten-v ing device, and pricking-points adapted to be held in said jaws, substantially as set forth.

3. In a metal-cutting machine, and in comA bination with the blade thereof, of clampingjaws opening upon a hinge and swung upon the blade-frame, one of said jaws having a longitudinal slotcut in its inner face, prickingpoints provided with a lug upon one side adapted to fit the slot in the said jaw, and tightening devices for said jaws, substantially as set forth.

4f. In a metal-cutting machine such as de scribed, the combination of the blade-frame, clampingjaws opening upon a hinge and swung upon the blade-i`rame and provided with a tightening device, pricking-points adapted to be held in said jaws, and a strip of wood or other suitable material iixed in the table to receive the said pricking-points, substantially as set forth.

5. In a mctalcutting machine such as dcscribed, the combination of the blade-frame provided with perforated hinge-lugs, clamp ing-jaws provided with hingelugs and swung IOO IIO

upon the hinge-lugs of said blade-frame,abolt passing through all of said hinge-lugs, and two sets of screw-bolts, substantially as set forth.

6. In a metal-cutting machine such as described, the combination of the blade-frame provided with hinge-lu gs and threaded perforations to receive the ends ofbolts, clamping-jaws provided with hinge and swung upon the said blade-frame and provided with perforations, substantially as described, and two sets of bolts, one passing through said clamping-jaws and engaging the threaded perforationsin said blade-frame,and the other set passing through one of the said clamping-jaws and engaging the perforations in the other, substantially as set forth.

7. In a metal-cutting machine such as de scribed, the combination of a table provided with transverse slots, angle-gages having pereclisse a provided with circular slots, substantially as described, anda bolt provided with a head fitting in said transverse slot, and a set-screw to engage said gage, substantially as set forth.

8. In a metal-cutting machine such as de scribed, the combination of a table provided with inverted-T-shaped slots passing transversely across the said table, angle-gages having perpendicular flanges about their inner angle, a bolt fitted in said transverse slots and provided with a nut adapted to engage said angle-gages7 and the cutting mechanism, substantially as set forth. Y

9. In a metal-cutting machine such as described, the combination of a table provided with transverse slots, parallel gages joined by equal links, and oneprovided with circular slots about the retaining bolts, and retainingbolts provided with heads fitting said transverse slots, a screw-thread and nut to engage said parallel gages, substantially as set forth.

10. In a metalcutting machine such as described7 the combination of a table provided with inverted-T-shaped slots passing trans versely across the said table,- parallel gages joined together by means of equal links and perforated to receive bolts, bolts fitted in said slots and provided with nuts adapted to engage said gages,and the cutting mechanism,snbstan tially as set forth.

1l. In a metal-cutting machine such as described, the combination of the blade-'frame provided with depending lugs, substantially as described, with pulling-rods pivotally attached to said lugs and tothe foot-lever, said pulling-rods being in sections provided with screw-threads and joined by swivel-links, a brace between said pulling rods provided with rings adapted to iit over the swivellinks upon said pulling-rods and provided with set-screws in each ring, and a foot-lever pivotally attached to the frame of the machine and to said pulling rods, substantially as set forth.

In testimony whereof I have hereunto set my 4 hand this 18th day of September, A. D. 1886.

JAMES D. MCDOUGAL. Witnesses:

J. A. Kre-HT, N. C. NnEDLns. 

